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Amorphous Elemental Boron (Passivated)

Executive standard: Q/YTY002-2011
CAS NO. 7440-42-8
English alias: Boron
Chines alias: 硼粉;单体硼
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Product parameters

Executive standard: Q/YTY002-2011

Chines alias: 硼粉;单体硼

English alias: Boron

CAS RN: 7440-42-8

1. Physical and chemical properties:
1.1 Elementary symbol: B
1.2 Atomic weight: 10.81(on 1979 international atomic weight)
1.3 Melting point: 2300±2℃
1.4 Sublimation temperature: 2550℃
1.5 Density: 2.34-2.37 g/cm3
1.6 Solubility: Insoluble in water, ethanol, ethyl ether and hydrochloric acid. Dissolved in cold concentrated basic solution and produced H2 at the same time. Can be oxidized by concentrated sulfuric acid or nitric acid and produced boric acid.
1.7 Properties: It is tasteless and odorless. In the periodic table of elements, boron is between metal element series and non-metal element series. Boron has many characteristics, such as, strong electronegative, low atomic radius, and centralized nuclear charge, therefore, the chemical properties of boron are relatively active. Boron is stable at normal temperature, but it will be oxidized when heated to 300℃  and burned if heated to 700℃. . The non-metal property of boron is similar to that of silicon. At high temperature, boron can react with oxygen, nitrogen, sulfur, halogen or carbon, etc. Boron can be combined with many sorts of metals to form metal boride.
2. Technical indexes:

Item Index
Total Boron (B) content, % ≥90.0
Water soluble Boron (B) content % ≤1.00
pH value 2.0-8.0
Moisture content, % ≤1.00
H2O2 insoluble, % ≤1.50
Particle size (d50),µm 1.00~5.00
Appearance Pale brown or brown-black powder

3. Application: Passivated boron is especially used as the high-energy fuel in fuel-riched solid propellant, which is consistent with hydroxyl-terminated polymer binder. Therefore, it can be added into the propellant slurry.
4. Safety instructions: Toxic by ingestion and inhalation. The damage of central nervous system, stomach and intestinal stimulation, ig. boron poisoning, are caused by inhalation of boron. Eyes bear slight stimulation as well. Be handled with rubber gloves, a respirator and eye protection by wearing protective clothing.
5 Packing: Vacuum-packaging. Aluminum foil bag with plastic bag, 1 kg net each.
6. Storage: Stored at cool, dry and ventilate place. The shelf life is 12 months after manufacturing date. It is still available if the retest results of the properties are qualified after expired date.
7. Transportation:Keep upright when transported, avoid violent collision and exposure. Do not mix with strong oxidizer.

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